﻿/* ===============================================================================  
 * Copyright (c) 2010 Acid Frameworks
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 * =============================================================================== */

using System;
using Acid.Graphics;

namespace Acid.Rendering
{
    /// <summary>
    /// A Primitive is the main unit of rendering in the Graph. It contains a VertexBuffer and IndexBuffer. It also contains a Material.
    /// </summary>
    public partial class Primitive : IPackObject, IDisposable
    {
        private static int Count { get; set; }

        /// <summary>
        /// The rendering device
        /// </summary>
        public Device       Device       { get; set; }
        /// <summary>
        /// This primitives Material
        /// </summary>
        public Material     Material     { get; set; }
        /// <summary>
        /// This primitives VertexBuffer
        /// </summary>
        public VertexBuffer VertexBuffer { get; set; }
        /// <summary>
        /// This Primitives IndexBuffer
        /// </summary>
        public IndexBuffer  IndexBuffer  { get; set; }
        
        public Primitive(Device device)
        {
            this.ID           = "primitive_" + Primitive.Count.ToString(); Primitive.Count++;
           
            this.Device       = device;
           
            this.Material     = null;
           
            this.VertexBuffer = null;
            
            this.IndexBuffer  = null;
        }


        #region Methods

        public void Draw()
        {
            if (this.IndexBuffer != null)
            {
                if (this.VertexBuffer != null)
                {
                    this.Device.IndexBuffer = this.IndexBuffer;

                    this.Device.SetVertexBuffer(0, this.VertexBuffer);

                    this.Device.Draw(Topology.Triangles);
                }
            }
        }

        #endregion

        #region IGraphObject Members
        /// <summary>
        /// This Primitives ID
        /// </summary>
        public string ID { get; set; }
        /// <summary>
        /// This Primitives Name
        /// </summary>
        public string Name { get; set; }
        #endregion

        #region IDisposable Members

        private bool disposed = false;

        private void Dispose(bool disposing)
        {
            if (!disposed)
            {
                if (disposing)
                {
                    if (this.IndexBuffer != null)
                    {
                        this.IndexBuffer.Dispose();
                    }
                    if (this.VertexBuffer != null)
                    {
                        this.VertexBuffer.Dispose();
                    }
                }

                this.disposed = true;
            }
        }

        public void Dispose()
        {
            this.Dispose(true);
        }

        ~Primitive()
        {
            this.Dispose(false);
        }

        #endregion
    }
}
